Lack of sound

Mybooklive is connected to Panasonic TH42 tv and to network via netricity plugs. The picture is fine but I have no sound from mybooklive.

Does your TV support the sound format of the files you’re trying to play?

Or if twonky supports the audio stream format in the file.

Twonky streams it as-is;  it doesn’t need to support the internal contents, only the file type.

So if twonky is Presenting the file, then Twonky supports it.